Observation of phonon softening in a Ti–Ni–Fe alloy by inelastic X-ray scattering
Observation of phonon softening in a Ti–Ni–Fe alloy by inelastic X-ray scattering
复制标题
通过非弹性 X 射线散射观察 Ti-Ni-Fe 合金中的声子软化
DOI：
10.1016/j.msea.2006.12.202
复制
发表时间：
2008
期刊：
影响因子：
6.4
通讯作者：
S. Tsutsui
中科院分区：
文献类型：
--
作者：
T. Ohba;D. Kitanosono;S. Morito;T. Fukuda;T. Kakeshita;A. Baron;S. Tsutsui
马氏体转变的声子软化是典型的一阶转变，是与转变机制相关的一个有趣的概念。最近，Kakeshita 和他的团队研究了各种 Fe 取代的 Ti-Ni 合金 [Ti-(50−x)Ni-xFe, at.%]，并报告了电阻率、磁化率和比热的异常情况。此外，他们观察了电子衍射图并报告了 Ti-44Ni-6Fe 合金中的二级特征，在转变为 R 相之前，该合金具有不相称-相称相变。为了观察 Ti-44Ni-6Fe 中的声子行为，进行了非弹性 X 射线散射实验。由于声子的能量比X射线的能量低约6个数量级，因此通过X射线非弹性散射实验观察声子需要精密的实验。同步加速器辐射设施 SPring-8 的光束线 BL35XU 用于实验。在不同的温度下测量了[zz0]TA2声子模式。观察到最软声子的温度约为 180K，对应于不相称-相称转变温度。中子非弹性散射和X射线非弹性散射实验结果之间可能存在的差异将在文中讨论。
Phonon softening of the martensitic transformation, which is a typical first-order transformation, is an interesting concept in connection with the transformation mechanism. Recently, Kakeshita and his group studied a wide range of Fe-substituted Ti–Ni alloys [Ti–(50−x)Ni–xFe, at.%] and reported anomalies in electrical resistivity, magnetic susceptibility and specific heat. Furthermore, they observed electron diffraction patterns and reported second-order-like features in a Ti–44Ni–6Fe alloy with an incommensurate–commensurate phase transformation prior to the transformation to the R phase. Inelastic X-ray scattering experiments were performed in order to observe the phonon behavior in Ti–44Ni–6Fe. Since the energy of phonons is about six orders of magnitude lower than that of X-rays, precise experiments are necessary to observe phonons by X-ray inelastic scattering experiments. The beam-line BL35XU at the synchrotron radiation facility, SPring-8 was utilized for the experiments. [ζζ0]TA2phonon modes were measured at various temperatures. The temperature at which the softest phonon is observed is at approximately 180K, corresponding to the incommensurate–commensurate transformation temperature. Possible differences between results of neutron inelastic scattering and X-ray inelastic scattering experiments will be discussed in the text.
影响因子：
6
作者：
Choi, MS;Fukuda, T;Kakeshita, T
通讯作者：
Kakeshita, T
等原子TiNi合金的中子散射研究
DOI：
--
发表时间：
2003
期刊：
J.Phys.IV France 112
影响因子：
--
作者：
Ken-ichi Tsubota;Taiji Adachi;Takeshi Karino;T.Ohba
通讯作者：
T.Ohba